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    Sound scattering by cylinders of noncircular cross section

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    DiPerna_thesis.pdf (11.58Mb)
    Date
    1993-10
    Author
    DiPerna, Daniel T.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/5576
    DOI
    10.1575/1912/5576
    Keyword
     Sound-waves; Fluids 
    Abstract
    This thesis investigates a new method for predicting the farfield scattered pressure of a plane wave due to an infinite cylinder of noncircular cross section. Both impenetrable and penetrable :fluid boundary condi tions will be treated for several types of cross sections and for a large frequency range. This new method requires the conformal mapping of both the exterior and interior of a closed surface to a semi-infinite strip. Numerically efficient algorithms wi ll be presented for both of these cases. A new method for satisfying the boundary conditions will be developed, as well as an efficient algorithm for generating the required modal functions on the boundary. Numerical results are presented for cross sections in the shape of an ellipse, square, and three leaf clover. In all cases, the results compare extremely well with exact or high frequency asymptotic results.
    Description
    Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and Woods Hole Oceanographic Institution October 1993
    Collections
    • Applied Ocean Physics and Engineering (AOP&E)
    • WHOI Theses
    Suggested Citation
    Thesis: DiPerna, Daniel T., "Sound scattering by cylinders of noncircular cross section", 1993-10, DOI:10.1575/1912/5576, https://hdl.handle.net/1912/5576
     

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